Global 4-Pole DP Contactor Market By Type (FLA Below 30A , FLA 30A-60A , FLA30A-90A , FLA90A-150A , and FLA Above 150A), By Application (HVAC and Air Conditioning , Pump and Compressor , Elevators and Cranes , Heating and Lighting , Food and Beverage , and Others), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2020-2029